<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <style type="text/css">
        *{
        	padding: 0;
        	margin: 0;
        }
			.nav {
				height: 44px;
             position: fixed;
             top: 0;
             left: 0;
				
			}

			.ad-l,
			.ad-r {
				position: fixed;
			}
			.ad-l {
				left:0;
				top: 100px;
			}
			.ad-r {
				right: 0;
				top: 100px;
			}
			.content {
				height: 1765px;
                width: 1200px;
				/* margin: 0 auto; */
				margin: 44px auto;

			}
        </style>
    </head>
    <body>
    <div class="nav">
    	<img src="images/top.png" alt="">
    </div>
    <div class="ad">
    	<img class="ad-l" src="images/ad-l.png" height="288" width="120" alt="" >
    	<img class="ad-r" src="images/ad-r.png" height="288" width="120" alt="">
    </div>
    <div class="content">
    	<img src="images/box.png" alt="">
    </div>
    </body>
</html>